One way to achieve this is by using a div with the image set as its background. Then, position the select boxes absolutely within the div. However, this method may not be ideal for full responsiveness. A more efficient approach would be to create a CSS + HTML layout without relying on an image. This alternative requires some coding skills.
.select {
background-image: url(https://i.hizliresim.com/2XxBuE.png);
width: 419px;
height: 160px;
position: relative;
}
#selectbox_a {
position: absolute;
left: 160px;
top: 115px;
}
#selectbox_i {
position: absolute;
left: 260px;
top: 115px;
}
<div class="select">
<select id='selectbox_a'>
<option>30</option>
<option>40</option>
<option>50</option>
</select>
<select id='selectbox_i'>
<option>30</option>
<option>40</option>
<option>50</option>
</select>
</div>